Adds lua help functions

[Jerboa-app]

Closes #125

[BurrowBot]

------------------------------------------------------------------------------
                           GCC Code Coverage Report
Directory: ..
------------------------------------------------------------------------------
File                                       Lines    Exec  Cover   Missing
------------------------------------------------------------------------------
include/atom.h                                66      40    60%   95,97,106,108-109,111,113,121,123-124,126,128,136,138-140,142,144,146,148-149,224,256,272,282,292
include/bond.h                                14      14   100%
include/camera.h                              56      51    91%   123-127
include/colour.h                              36      16    44%   132,134,143,145,175,197,199-200,202-205,208,210-212,214,217-219
include/commandLine.h                        251     160    63%   91,93-100,102-103,105-106,115,117-120,122-124,126-127,129-130,150,160,170,180,182-183,185,187-188,198,208,210-211,224,226-233,399-400,405-408,422-425,439-442,456-459,465,467-469,473-476,490-493,495-497,512-513,518-521,548,558-560,1036
include/config.h                             132     127    96%   212,215-218
include/console.h                            162     104    64%   50,50,52,52-53,53-54,54,72,74-76,107,109,111-115,117,128,130,132-136,138,149,151,153-158,167,169,171-176,185,187,189-194,358,358,358,383-385
include/element.h                             48      38    79%   692-694,696,698,706,751,753-754,758
include/hierarchicalTriangularMesh.h          16       0     0%   35,37,39,41,43,45,47,49,51,53,55,57,59,61,63,65
include/jompegRecord.h                        25       0     0%   30,36-37,39-40,42,49,51-52,54,56,59,61,63,70,72-74,82,84-86,93,95-96
include/lua.h                                 27       9    33%   36,45,47-48,50,52-53,55-56,59,62,64-65,75,77-78,80-81
include/LuaArray.h                            19      12    63%   36-40,93-94
include/luaBindings/camera.h                 100      55    55%   16-17,47,49,51-55,57-60,62-66,68,83-84,89-92,113-114,119-122,143-144,149-152,173-174,179-182,203-204
include/luaBindings/visualisationState/atoms.h
                                             199     146    73%   29-30,34-37,48-51,82-83,87-90,99-102,107,129-130,151-152,156-159,177-180,212-213,217-220,229-232,294-295,299-302,311-314
include/luaBindings/visualisationState/bonds.h
                                              57      36    63%   17-18,23-26,37-40,46,66-67,72-75,86-88,94
include/luaBindings/visualisationState/utils.h
                                              23       0     0%   12,14,16-20,22-25,27-28,30,32-33,41,43,45-49
include/LuaBool.h                              9       7    77%   77-78
include/LuaNumber.h                            8       6    75%   76-77
include/LuaString.h                           16      14    87%   78-79
include/LuaTable.h                            17      15    88%   88-89
include/LuaVec.h                              13      11    84%   75-76
include/neighbours.h                          86      85    98%   232
include/record.h                              24       0     0%   31,69,71-75,78-81,98,114,116,118,120,124-125,143,145,147,149-151
include/structure.h                           80      52    65%   73,75,77,79-80,84-86,217,219-220,222,226,228-229,231,250,253-256,304-305,311-312,314-316
include/structureUtils.h                      19      11    57%   29,46,48,50,52,55-57
include/util.h                                65      20    30%   35,37-39,43-44,81,83-85,88,90,94,97-98,128,130-131,141,143-144,146-147,149-151,153-154,156-158,162,166,168-169,171-172,179,181-187
include/visualisationState.h                  52      28    53%   69,76,105,107,150,152,154-155,173-174,176-179,181-185,187,189-190,194,197
include/xyz.h                                 83      77    92%   105,138,141-144
------------------------------------------------------------------------------
TOTAL                                       1703    1134    66%
------------------------------------------------------------------------------